<template>
  <div class="login_container">
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!--登入区域-->
      <div>
        <el-form
          ref="loginFormRef"
          label-width="0px"
          class="login_form"
          :model="loginForm"
          :rules="loginFormRules"
        >
          <!--用户名-->
          <el-form-item prop="username">
            <el-input
              prefix-icon="iconfont icon-user"
              v-model="loginForm.username"
              placeholder="请输入您的用户名"
              prop="username"
            ></el-input>
          </el-form-item>
          <!--密码-->
          <el-form-item prop="password">
            <el-input
              prefix-icon="iconfont icon-3702mima"
              v-model="loginForm.password"
              type="password"
              placeholder="请输入您的密码"
            ></el-input>
          </el-form-item>
          <!--按钮-->
          <el-form-item class="btns">
            <el-button type="primary" @click="login()">登录</el-button>
            <el-button type="info" @click="reset()">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      //登陆表单数据表项
      loginForm: {
        username: "admin",
        password: "123456"
      },
      //表单验证规则
      loginFormRules: {
        //验证用户名是否合法
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          { min: 4, message: "长度至少为四个字符", trigger: "blur" }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          { min: 4, message: "长度至少为四个字符", trigger: "blur" }
        ]
      }
    };
  },
  methods: {
    reset() {
      let _this = this;
      _this.loginForm.username = "";
      _this.loginForm.password = "";
    },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return;
        const { data: res } = await this.$http.post("login", this.loginForm);
        if (res.meta.status !== 200) return this.$message.error("登录失败！");
        this.$message.success("登录成功");
        // 1、将登录成功后的token，保存到客户端的sessionStorage 中
        // 1.1 项目中除了登陆之外的其他API接口，必须在登录后才能访问
        // 1.2 token 只应在当前网站打开期间生效，所以将token保存在sessionStorage 中
        console.log(res);
        window.sessionStorage.setItem("token", res.data.token);
        this.$router.push("/home");
      });
    }
  }
};
</script>
<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      height: 100%;
      width: 100%;
      background-color: #eee;
      border-radius: 50%;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
